Charts

1. In a bar chart, the height of each bar will represent the number of units, which can be read off the y-axis. Bar charts are used for qualitative data.

Example 1:

If we look at this chart, we can see that 12 people had a purple car, 3 people had red cars, 7 people had yellow cars etc.

2. A pie chart is used to show the proportion of a specific amount.

Example 2:

This pie chart shows the favourite foods of 40 people.  Using that, we can find out how much each segment represents.  For example, pizza represents half of the ‘pie’ so it must be 20 people.

3.  Pictograms have a picture which represents a certain number (you can find out what it represents by looking at the key).

Example 3:

This pictogram tells us how many days in each month it didn’t rain. For example, in May, it didn’t rain on eight days. Why don’t you try to figure out how many days it didn’t rain in the other months?

1) Joshela is collecting information about how many books the people in this school have read in the past week. This is a tally chart of the answer – Fill in the frequencies.

Use the results to complete this pictogram

How many more book did yr6 need than year 5?

2) Bilal’s school is having a survey on what people’s favourite sports are. This is a bar chart of the results

Which is the most popular sport?

How many people took part in the survey?

3)

 100 children tell us what their favourite colour is

How many children chose purple?

How many children chose red?